Electronic Fuel Injection (EFI) Engines

Electronicfuelinjectionefiengines 10080000
Subarurobin 10074755

In addition to its current line of engines, Subaru offers a new line of electronic fuel injection (EFI) engines, which are ideally suited for use with a variety of equipment, including welders, generators, pressure washers and lawnmowers. The line includes two models, the EH72 V-Twin and EH72 UTV, both of which are designed to reduce fuel consumption and emissions, while providing fast, easy starts in a wide range of ambient temperatures. The EFI engines run on an open-loop system, which utilizes an electronic control unit (ECU). Using several different sensors that are able to accurately detect manifold pressure, ambient temperature and throttle position, the ECU is constantly relaying information to the injector, which is then able to deliver the proper air-to-fuel ratio. The result of this continuous relay of information is an engine that is always running at an optimal level, resulting in better fuel economy and emissions control. Allowing for differences in operating speed, applications and fuel type, the estimated fuel economy improvements are 11 to 25 percent over that of a similar carbureted engine. Additionally, exhaust emissions are reduced by more than 20 percent. Both models are available in a 653 cc or 720 cc configuration, with power outputs ranging from 20- to 27-horsepower. The engines feature a two-barrel manifold with a fuel injector for each cylinder. This allows each cylinder to operate independently of the other, which aids in fuel optimization and also in improving the engine's efficiency and performance.

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